Home / 715,814.10-987,826.85-393,545.07

Finding the Fourth Proportional to 715,814.10, 987,826.85 and 393,545.07

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Solution

The fourth proportional to 715,814.10, 987,826.85 and 393,545.07 is: 543,094.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,814.10 : 987,826.85 = 393,545.07 : x
  2. Step 2: Convert to fraction form
    715,814.10/987,826.85 = 393,545.07/x
  3. Step 3: Cross multiply
    715,814.10x = 987,826.85 × 393,545.07
  4. Step 4: Simplify right side
    715,814.10x = 388,754,384,863.40
  5. Step 5: Solve for x
    x = 388,754,384,863.40/715,814.10
  6. Step 6: Final answer
    x = 543,094.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.